Valve-spring tool



J. LUFT.

VALVE SPRING TOOL.

APPLICATION man rmv. 22,1920.

Patented Mar. 28

2 SHEETS-SHE J. LUFT.

VALVE, SPRING TOOL.

APPLICATION FILED NOV. 22. 1920.

Patented Mar. 28, 1922.

2 SHEETSSHEET 2.

Jake L ufi UNITED sTArss PATENT OFFICEJ JAKE LUFT, or nmgsnow v; KANSAS.

VA RBF Q E OL- thereof into such position that it may be readily gripped and removed by the operator.

An important object is the provision of a device of this character provided with cam means of novel construction for compressing the spring to move it. out of engagement with its retaining pin.

Another object is the provison of a device of this character which, when set, will leave both hands of the Operator free for any operation which he may wish'to perform. V

An additional object is the provislon of a device of this character which will-be simple and inexpensive in manufacture, easy to operate, eflicient in use, durable in service, and

a general improvement in the art.

lVith the above and other objectsand advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimedand illustrated in the accompanying drawings in which I Figurel is a side elevation. of my device showing it in use associated with a valve and the spring of an engine and in initial position,

Figure 2 device actuated to compress the valve spring,

Figure 3 is a front elevation of my device detached,

Figure 4 1s a detail longitudinal sectional view'through the upper portlon and showin; the valve engaging member,

Figure is across sectional view there through, and I I,

Figure 6 is a cross sectional view showing the bottom memberin plan.

Referring more particularly to the drawings, the letter A designates a valve of an internal combustion engine, B designates the stem thereof, C the valve spring, D the valve Specification of Letter s'lfatent, Patented anae a m N b e0, se ia rperase.

is a similar view showing the Mar; 28, 1922.

il -t tre W sh r; andv E the valve springres aming Pin- V "In carrying out 'my invention I provide a substantially urshaped yoke 10 which has its upp r a m term at g n a b ing 11 an l which has its lower arm terminating in a foot 12 which is forked as shown, and \vl lch has its points tapered. At the sides of the fork are formed upstanding lugs 13 tor a mrpes b ,deseribed,

spindle 14: which its lower end formed vii-h n tv r ly ex ending flan preventing upward displacement of the spindle This spindle is bifurcated, as shown at 16 and pivoted at 17 within the bifurcation is a hook-shaped cam 18 which has its end portion formed with a notch 19 and which has its other end elongated to form a handle 20. l The confronting faces of the walls of the bifurcation 16 are longitudinally curved, as shown at 21. The bifurcation 16 does not extend throughout the length of the, spindle but leads into a bore '22 through the lower end thereof. Slidable through the bore 22 is a rod 23 which has its upper end provided with a transverse pin 24 which engages within the grooves 21 for preventing rotation of the rod. The upper end of this rod is engageable bythe cam 18 whereby the rod may be moved downwardly, as will .be hereinafter explained. The lower end of the rod 23 is split to define laterally extending arms 25 which carry depending pins 26 engageable within the holes commonly provided in valves of this character. I

The operation of the device is as follows: The operator engages the forked foot 12 below the spring washer D and places the device so that the pins 26 are engaged within the holes in the valve. He then grasps the handle 20 of the cam and swings itdownwardly whereupon the engagement of the cam with the upper end of the rod 23 will move the rod downwardly resulting in compression of the valve spring (1. When the rod 23 is forced downwardly the notch 19 will engage with the upper end of the rod, -which is beveled to form a catch 27 whereupon the parts will be held in this position with the valve spring compressed. The operator then may grasp the handle 20 and rotate the spindle '14 together with the rod 23 in either direction and this will result in partial rotation of the valve A so that the I valve spring retaining pin E may be brou ht structed and easily applied and operated;

device by means of which the valve spring into such position thatit-may be rea ily grasped by the operator and be withdrawn. From the foregoing description and a study of the drawings it will be apparent that I have thus provided a simply conn grinding the valves or other similar operah right to make such changes the form,

tion.

While I have shown and described the preferred embodiment of my invention, it is of course to be understood that I reserve the construction, and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claim.

'Having thus described'my invention; I

claim i A device of the character described comprisinga substantially U-shaped yokehaving its lower end forked for engagement beneath a valve spring and having its upper end formed with a bearing, a bifurcated member associated with said bearing, a plunger slidable through said bearing and adapted for engagement with a valve head,

and a cam pivoted within said bifurcated member and engaging saidplunger, the termina-l of said cam being formed with a catch engageable with the extremity of the plunger whereby to lock the cam against movement.

In testimony whereof Iaffix my signature.

J AKE 'LUFT. 

